Diane Winston, University of Southern California, Annenberg School for Communication and Journalism

In the '60s, a Roman Catholic religious order, the Immaculate Heart Sisters, created a new vision of a religious community. Meghan Markle, engaged to Prince Harry, attended the high school founded by the nuns.

A liturgy expert explains that until the 12th century local bishops made decisions on Catholic liturgical practices even though the Catholic Mass was celebrated in Latin until 1970. How did that change?

A 1932 photograph showing the minaret of the Great Mosque of al-Nuri, Mosul.
Library of Congress Prints and Photographs Division Washington, D.C. September 18, 2017